Tab Flag (FREE) – Mark Unread Firefox’s Tab with Symbol or Character

The test steps – Tab Flag 1.2resigned1
On: Windows 11 Home
Install from: https://addons.mozilla.org/en-US/firefox/addon/tab-flag/

1. Go to the link above and click a button ‘Add to Firefox’.

The new window shows, click ‘Add’.

The new window shows, click ‘OK’.

 

See the picture below, click the icon.

 

Click a gear icon of ‘Tab Flag’, then click ‘Manage Extension’.

 

 

The new page shows.

 

Click ‘Options’.

 

You can character or select a symbol.

 

The 3 pictures below are unread tabs marking with symbols.

 

When tab is clicked, the symbol is gone.

 

 

The picture below is unread tabs marking with characters 'UNREAD'.

 

This is the best add-on for marking unread tab so far.

 

The test steps – Tab Flag 1.2resigned1
On: Windows 11 Home
Install from: https://addons.mozilla.org/en-US/firefox/addon/tab-flag/